II. His Ruling Symbols from The Philosophy of Shelley’s Poetry in Ideas of Good and Evil by William Butler Yeats.

“The Moon is the most changeable of symbols, and not merely because it is the symbol of change. As mistress of the waters she governs the life of instinct and the generation of things” [via]

Consider also:

  1. “often caves are, he says, symbols of ‘all invisible power; because as caves are obscure and dark, so the essence of all these powers is occult,’ and quotes a lost hymn to Apollo to prove that nymphs living in caves fed men ‘from intellectual fountains’; and he contends that fountains and rivers symbolize generation, and that the word nymph ‘is commonly applied to all souls descending into generation,’ and that the two gates of Homer’s cave are the gate of generation and the gate of ascent through death to the gods, the gate of cold and moisture, and the gate of heat and fire.”
  2. “The bees hive in the mixing bowls and jars of stone, for so Porphyry understands the passage, because honey was the symbol adopted by the ancients for ‘pleasure arising from generation.'”
  3. “The poet of essences and pure ideas must seek in the half-lights that glimmer from symbol to symbol as if to the ends of the earth, all that the epic and dramatic poet finds of mystery and shadow in the accidental circumstance of life.”
  4. “Cold, he says, causes life in the world, and heat causes life among the gods, and the constellation of the cup is set in the heavens near the sign Cancer, because it is there that the souls descending from the Milky Way receive their draught of the intoxicating cold drink of generation.”
  5. “It may be that his subconscious life seized upon some passing scene, and moulded it into an ancient symbol without help from anything but that great memory; but so good a Platonist as Shelley could hardly have thought of any cave as a symbol, without thinking of Plato’s cave that was the world; and so good a scholar may well have had Porphyry on ‘the Cave of the Nymphs’ in his mind.”